problem adjusting histogram

Previous Topic Next Topic
 
classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

problem adjusting histogram

Glen MacDonald
Hello,
I posted the problem below.  One response questioned the version of  
Java and IJ.  We upgraded the Java to the latest 1.6, and ImageJ has  
always been latest beta.  Still, adjusting the histogram by  
Brightness/Contrast or Color Balance continues to corrupt the  
histogram of the visible slice as though the right hand histogram  
limit has been dragged far to the left.  A problem that  occurs on 8-
bit, 16-bit and RGB images, but doesn't occur on every file or on all  
channels.

On the other hand, with the new version of Java, we can now assign  
 >1.8 Gb RAM on a 64-bit Linux system.  Currently setting the ImageJ  
memory to 5120 Mb.

Regards,
Glen

> With Linux and WinXP versions of ImageJ I've found that adjusting  
> colors on RGB stacks often corrupts the histogram of the visible  
> stack slice.  As I adjust the limits of the histogram performing a  
> histogram stretch, the upper limit moves to the left by itself and  
> the image becomes saturated.  the remaining images in the stack are  
> not affected. This seems to occur about half the time, but not at  
> all with OSX.
>
> Is this something that I can avoid?
>
> thanks,
> Glen